Warning in the jvb.log

Hi,

Thank you very much for your work and great product.
Last month, we used this tool for conferences only in small groups, which is good. But sometimes, if there are more than 20 users in the room, users cannot hold a conference.
The problem is not regular, but frequent
At the same time, the use of the processor (8 cores) and RAM in the jitsi-meet web server is still low
CPU utilization in jitsi-videobridge is still about 20%, RAM - 40-50%. Bandiwdth (UL + DL) about 80-140 Mbps

here is some kind of magazine that i get on jitsi videobridge

2020-04-23 09:39:57.909 WARNING: [58] [confId=b0460abb0226db65 epId=674f8ed2 gid=ff0f84 stats_id=Cassidy-to8 conf_name=juliyavi] EndpointConnectionStats.processReportBlock#115: Suspiciously high rtt value: 20729.825484 ms, remote process
ing delay was PT1.214004516S (79561), srSentTime was 2020-04-23T04:39:35.965170Z, received time was 2020-04-23T04:39:57.909Z
2020-04-23 09:39:58.273 WARNING: [58] [confId=b0460abb0226db65 epId=674f8ed2 gid=ff0f84 stats_id=Cassidy-to8 conf_name=juliyavi] EndpointConnectionStats.processReportBlock#115: Suspiciously high rtt value: 20698.101085 ms, remote process
ing delay was PT1.146987915S (75169), srSentTime was 2020-04-23T04:39:36.427911Z, received time was 2020-04-23T04:39:58.273Z
2020-04-23 09:39:58.589 WARNING: [49] [confId=b0460abb0226db65 epId=674f8ed2 gid=ff0f84 stats_id=Cassidy-to8 conf_name=juliyavi] EndpointConnectionStats.processReportBlock#115: Suspiciously high rtt value: 20476.091442 ms, remote process
ing delay was PT1.684997558S (110428), srSentTime was 2020-04-23T04:39:36.427911Z, received time was 2020-04-23T04:39:58.589Z

I increased the size of the buffer
net.core.rmem_max
net.core.rmem_default
up to 25 Mb
got better but the problem did not disappear
Tell me what else can be corrected or optimized?

also add:
Resolution reduced to 640
and set parameters:
enableTcc: false
enableLayerSuspension: true
disableH264: true

Hi @stepan. Did you find a solution for this?